polr OLS omitting coefficients?

Hi, I hope this is straight forward.

I am running an ordinal logistic regression test using the following code:

polr(formula = ordered(as.factor(df$measures.protection)) ~ df$primary.residence + 
    df$age, Hess = TRUE)

It works fine, but the output seems to be omitting the first group of each IV.



For age, there is also a "26-35" group, and primary.redident should have a "No" coefficient.

Am I just reading this entirely wrong? I've watched many videos and they all seem to get every group within the coefficients section.

Remember that you can't have more than one complete set of dummies because of perfect multicollinearity problems. (This may or may not be the issue you're seeing.)

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